A father of three who rode his bike to work each night at a fast-food shop in a tough part of Brooklyn died yesterday from wounds he suffered helping his boss roust a vagrant from the store, cops said.

“I don’t know what I’m going to do without him,” said Brenda Estrella, whose husband, Angel, was fatally stabbed in the Tuesday night conflict.

Police said the 33-year-old Bushwick victim – who made $5.75 an hour at the Popeye’s restaurant at 1 Flatbush Ave. – was killed by a homeless man who had been bounced from the eatery for drinking a beer. When the man returned, he was confronted by the manager.

“He never said it was dangerous, but he didn’t like to be there alone at night,” said Estrella, 34.